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Numerical analyses on optical limiting performances of chloroindium phthalocyanines with different substituent positions |
| Yu-Jin Zhang(张玉瑾)1, Xing-Zhe Li(李兴哲)2, Ji-Cai Liu(刘纪彩)2, Chuan-Kui Wang(王传奎)1 |
1. College of Physics and Electronics, Shandong Normal University, Jinan 250014, China;
2. Mathematics and Physics Department, North China Electric Power University, Beijing 102206, China |
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Abstract Optical limiting properties of two soluble chloroindium phthalocyanines with α-and β -alkoxyl substituents in nanosecond laser field have been studied by solving numerically the coupled singlet-triplet rate equation together with the paraxial wave field equation under the Crank-Nicholson scheme. Both transverse and longitudinal effects of the laser field on photophysical properties of the compounds are considered. Effective transfer time between the ground state and the lowest triplet state is defined in reformulated rate equations to characterize dynamics of singlet-triplet state population transfer. It is found that both phthalocyanines exhibit good nonlinear optical absorption abilities, while the compound with α -substituent shows enhanced optical limiting performance. Our ab-initio calculations reveal that the phthalocyanine with α -substituent has more obvious electron delocalization and lower frontier orbital transfer energies, which are responsible for its preferable photophysical properties.
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Received: 29 July 2015
Revised: 21 August 2015
Accepted manuscript online:
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PACS:
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33.80.-b
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(Photon interactions with molecules)
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82.50.Pt
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(Multiphoton processes)
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31.15.A-
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(Ab initio calculations)
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| Fund: Project supported by the National Basic Research Program of China (Grant No. 2011CB808100), the National Natural Science Foundation of China (Grant Nos. 11204078 and 11574082), and the Fundamental Research Funds for the Central Universities of China (Grant No. 2015MS54). |
Corresponding Authors:
Chuan-Kui Wang
E-mail: ckwang@sdnu.edu.cn
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Cite this article:
Yu-Jin Zhang(张玉瑾), Xing-Zhe Li(李兴哲), Ji-Cai Liu(刘纪彩), Chuan-Kui Wang(王传奎) Numerical analyses on optical limiting performances of chloroindium phthalocyanines with different substituent positions 2016 Chin. Phys. B 25 013302
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